scott



(No Model.) 3 Sheets Sheet I.

J. R. SCOTT. LEATHER SKIVING MACHINE.

No. 521,090 Patented June 5, 1894.

WITNESSES:

INV'ENTOR:

I J JZzcaZBYKSZIOZZ' ATTORNEYS. 7

me COMPANY (No Model.) 3 Sheets-Sheet 2.

J. R. SCOTT. LEATHER SKIVING MACHINE.

Patented June 5, 1894.

INVENTOR: 1605 5 053 me NATIONAL umoann nme COMPANY,

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(No Model.) a Sheets-Sheet 3.

J. R. SCOTT. LEATHER- SKIVING MACHINE.

No; 521,090. Patented June 5, 1894.

WITNESSES: lNVE-NTOR:

hulk-620th W 2 BY ATTORNEYS.

UNITED STATES PATE T OFFICE.

JACOB R. SCOTT, OF NEW YORK, N. Y.

LEATH ER-SKIVING MACHlN E.

SPECIFICATION forming part of Letters Patent No. 521,090, dated June 5, 1894.

Application filed September ll, 1893. Serial No. 485,501- (No model.)

To all whom it may concern:

Be it known that I, J AOOB B. SCOTT, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Skiving-Machines, of which the following is a specification.

This invention relates to certain improvements in skiving machines as pointed out in the following specification and claims and illustrated in the accompanying drawings, in which Figure 1 represents a front view. Fig. 2 is a plan or top view. Fig. 3 is an end View looking in the direction of arrow 1, Fig. 1. Fig. at is a transverse vertical section in the plane ww Fig. 1. Fig. 5 is a similar section in the plane a: a: Fig. 1. Fig. 6 is a partial transverse vertical section in the plane y y Fig. 1, showing the means for adjusting the knife. Fig. 7 is a longitudinalsection of a portion of the feed wheel and the gravitating clearers, the plane of section being indicated by the line 2 2 Fig. 4. Fig. 8 is an elevation of the die roller and end gage detached. Fig. 9 is an end view of the die roller, feed wheel and knife, showing the edge gage with the cam groove for actuating the end gage. Fig. 10 is a horizontal section in the plane 00' m Fig. 4:. Fig. 11 is an end view of the inner bearing of the knife head on.a larger scale than the previous figures. Fig. 12 is a plan view of the blank for a counter stifiener. Fig. 13 is a transverse vertical section in the plane y y Fig. 7.

In the drawings the letter A designates the base of a frame which is supported by a column B or any other suitable means. From the base A rise three standards 0, D, E and the standards D E are-connected by a vertical web F, all these parts being cast integral or.

formed in any other suitable manner. The standards D E form the bearings for a shaft G on which is firmly mounted the cog wheel 0 which engages a cog'wheel d mounted on the driving shaft I which has its bearings in the standard E and on which is loosely mount ed a belt pulley e which can be thrown in gear with the shaft I by means of a clutch-sleeve f. This clutch-sleeve is feathered on the driving shaft and it is actuated by means of a lever g mounted on a bracket h which extends from the base Aand which can be secured in the desired position by means of pin 2'. In the standards D E is also mounted a shaft J which forms the bearing for a bifurcated lever K in the upper ends of which is mounted a shaft H which is geared with the shaft G by the cogwheels b a. The lever K is exposed to the action of two setscrews la is by means of which it can be adjusted and lockedin the required position. The shaft G carries the die roller L and the shaft H the feed-roller M. By means of the set-screws k the feedroller can be adjusted at the required distance from the die-roller. In the surface of the die-roller L is formed the die Z and in the body of said die-roller is formed a cavity Z to receive the end gage A (Fig. 8.) On the top of the standard D is secured a bracket P which carries the edge gage p.

Q is the knife which is secured to a head R and can be adjusted and locked in the required position by screws (1 q and set screws q q. The knife head R is mounted on a shaft 7' which has its bearings in the standards O D and from this head extends a toothed segment which engages a worm screw 5 mounted in a lever S (best seen in Fig. 4) which swings on an arbor s and is exposed to the action of a set screw 8 By means of the worm screw 5 the cutting edge of the knife can be adjusted at the required distance from the die roller L and by means of the screw s the worm screw can be forced up firmly against the toothed segment 7* so as to lock the knife in the required position.

- By referring to Patent No. 493,189, granted to me March 7, 1893, it will be found that all the parts referred to in the foregoing description are contained in the machine described in the above named patent, and I havefound that the machine constructed according to this patent works perfectly well for a large number of articles which can be skived by means of dies rising above the surface of the die roller L. But for many articles such for instance as counter stiffeners it is preferable to use diesZ which are sunk into the surface of the die roller and I have found, that in order to be able to produce perfect work in skiving such articles, certain alterations had to be madein the mechanism and I will now proceed to describe the same.

As already stated, the die-roller L is pro vided with a cavity Z (Fig. 8) to receive the end gage 'm. This cavity extends in-a radial direction as indicated in Figs. 4 and 9 so that the end-gage can be moved out to the position shown in Fig. 4 or that it can be pushed in far enough to'clear the knife Q, the cutting edge of which may be situated quite close to the surface of the die roller as shown in Fig. 9. For the purpose of imparting the required motion to the end-gage. a roller-stud is provided which projects from the outer edge of the end gage at a distance from its outer end as shown in Figs. 4, 8 and 9 and this rollerstud engages a cam groove 16 formed in the face of the edge-gage p. This cam groove is made in such a way, that the roller stud 15 fits the same closely except between the points 17 and 17" (Fig. 9) where the change in the position of the end gage is to take place. At this point the cam groove is wide enough to give the roller-stud 15 a certain play in a radial direction so that when the roller-stud reaches this portion of the cam groove, the end-gage m can be pushed back from the position shown in Fig. 4 to that shown in Fig. 9 by the action of the feed wvheel M and as soon as the teeth of the feed wheel have taken hold of the blank, the roller stud 15 strikes the point 17 of the cam groove and the end gage is moved inward so as to clear the knife. After the knife has cut through the blank and when the die roller has reached the position shown in Fig. 4, the end gage m is far out so that the operative can hold the end of the next blank firmly against the end gage and since the end gage is not drawn back, until the teeth of the feed wheel have taken a firm hold of the same, the blank cannot be pushed in beyond the desired position and the danger of miscutting or spoiling the blank is avoided.

Another device which I have added to the machine described in my Patent No. 493,189 has for its object to adjust the edge of the blank automatically in the proper relation to the die,such device being required forinstance when the machine is used for producing counterstitfeners. By referring to Fig. 12 of the drawings it will be seen that the inner edge 18 of the blank for a counter stiffener is curved and the ends of the die Z (see Fig. 2) are necessarily at a greater distance from the edge gage 13 than the intermediate portion.

In introducing the blank into the machine the operative places the front end of the blank upon the end gage m (Fig. 4) while the edge of the blank at its front end is brought to bear against the edge gage p as indicated in dotted lines in Figs. 1 and 2 and if it is left in this position, the blank may not be exactly in the proper position towardthe die Z. For the purpose of adjusting the blank automatically in the proper position toward the die Z before the feed wheel begins to act upon the same, I use a cam 19 which is secured to the arms 20 of the cogwhccl c, as shown in which the shaft is turned.

Figs. 3 and 4 which show face views of the cam, while Figs. 1 and 2 show side views of the same. This cam 19 acts upon a roller stud 21 which is secured to a lever 22 (best seen in Figs. 2 and 5, also in dotted lines in Figs. 3 and 4). This lever has its fulcrum on a pivot 23 secured in a bracket 24 which is fastened to the standard E (Fig. 5). From the free end of the lever 22 extends a rod 25 through a bracket 26 which is secured to the standard E and from which extends a yoke 27 which carries an eye 28 so that room is obtained for a spring 29 which is placed upon the rod 25 (Fig. 1) and the tension of which can be adjusted by means of a collar 30 and set screw 31. Onthe front end of the rod 25 is secured a head which can be adjusted. by means of a set-screw 33 and which carries a rod 34 which extends through an opening in the edge gage 19. At the moment when the die roller has reached the position shown in Figs. 2 and 9 the high point 35 of the cam 19 (Fig. 2) acts upon the roller stud 21 and the rod 34 is moved forward so that it acts upon the edge of the blank and adjusts the same in the proper position in relation to the die Z. The spring 29 has a tendency to force the roller stud 21 toward the face of the cam 19 and the throw of the rod 34 can be adjusted by means of the head 32.

When the die roller L is provided with a sunken die Z, it is very desirable in order to produce correct work, that the cutting edge of the knife shall be exactly parallel to the face of the die roller as indicated in Fig. 10 of the drawings and also that the distance between the cutting edge and the surface of the die roller can be rapidly and minutely adjusted. In order to effect these purposes I have provided the shaft 0* of the knife head at its inner end with an eccentricjournal 35 (see Figs. 10 and 11) and I have made the bearings of the shaft oblong in cross-section, the hearing 36 for the outer end of said shaft being shown in Fig. 3 and the bearing 37 for theinner end of said shaft being shown in Fig. 6 and I have provided set screws 39 for adj usting and securing the journal in the oblong bearing 36 and set screws 40 for adjusting and securing the journal in the oblong hearing 37. By referring to Figs. 1 and 10 it will be seen that the outer end of. the shaft '1' extends beyond the standard 0 and in its projecting end is made a hole 41 so that a pin can be inserted for the purpose of turning the shaft in its bearings. Of course any other suitable means can be used for turning. the shaft.

If the shaft 0 is turned in its bearings, it turns round the center 42 (Fig. 11) of the cocentric journal 35 and the center 43 of the body of said shaft is moved toward or from the die roller according to the. direction in For instance if the shaft is turned in the direction marked on it in Fig. 11, the center 43 of its body is moved toward the position 43*. Of course IOG before the shaft 1* can be turned, the set screws 39 and 40 must be released and'after the shaft has been turned, the set screws are tightened. By turning the shaft '2" the cutting edge of the knife is bodily moved toward or from the die roller, but if the cutting edge should not be exactly parallel with the surface of the die roller, the defect can be remedied by means of the set screws 39 and 4.0, by means of which either one or the other journal of the shaft 1' can be moved toward or from the die roller.

The feed roller M is composed of a series of disks 44 (Fig. 7) each of which is formed with a short hub 45 and these hubs form the bearings for clearing blades 46 which are hung loosely thereon so that the same when permitted to follow their inherent gravity, assume the position shown in Fig. 4. The feed roller is protected by a guard N (Figs. 2 and 4) and each of the clearing blades is provided with a spur 46* (best seen in Fig. 4). If at any time the teeth of the feed roller become choked, one or more of the clearing blades will be carried up and as the spurs 46* strike the front edge of a stop composed, as here shown, of the guard N, while the movement of the feed roller continues, the impurities will be thrown out and the clearing blades will return to their normalposition.

What I claim as new, and desire to secure by Letters Patent, is.

1. The combination with the die roller, the

feed roller and the knife of an end-gage movably fitted into the die roller and a stud 15 projecting from the end-gage and made to engage a cam groove 16 in the edge gage substantially as described.

2. The combination with the die roller the feed roller and the knife of an end-gage movably fitted into the die roller, a stud 15 projecting from the end-gage and made to engage a cam groove 16, arranged in the edge gage and having an open space 1717* to per mit the feed roller to push back the end-gage and take hold of the blank substantially as described.

3. The combination with the die roller, the feed roller, the knife and the edge-gage of a pusher 34 for adjusting the blank automatically in relation to the die and means for actuating the pusher substantially as described.

4. The combination with the die roller, the feed roller, the knife, the edge-gage and the pusher 84 of a cam for moving the pusher forward and a spring for retracting the same substantially as described.

5. The combination with the die-roller, the

feed-roller, and the knife, of a rocking knifehead provided at opposite ends with projecting journals, one of which is eccentric to the other, bearings oblong in cross-section into which the journals fit and in which said journals are adapted to turn, and means for locking the journals in any desired position, substantially as described.

6. The combination with the die-roller, the feed-roller, and the knife, of a rocking knifehead provided at its opposite ends with projecting journals, bearings oblong in cross section in which the journals are adapted to turn, and devices engaging the journals for lockin g them in any desired position, substantially as described.

7. The combination with a knife, and a die-. roller, of a shaft carrying a feed-roller composed of sections, gravitating clearing blades encircling the shaft bet-ween the roller sections, having spurs or projections and swung upward bychoking of the feed-roller, and a stop arranged in the path of the spurs or projections on the clearing blades for arresting their upward swinging motion, substantially as described.

8. The combination substantially as herein JACOB R. SCOTT.

Witnesses:

W13. 0. HAUFF, E. F. KASTENHUBER. 

